1. Infectious Diseases, Department of Mental and Physical Health and Preventive Medicine, Università della Campania “Luigi Vanvitelli,” Naples, Italy;
2. Infectious Diseases Department, Centre Hospitalier Universitaire (CHU) Saint-Pierre, Brussels, Belgium;
3. Hematology Department, Laboratoire Hospitalier Universitaire de Bruxelles - Université Libre de Bruxelles, CHU Saint-Pierre, Brussels, Belgium